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| author | Richard Sandiford <richard.sandiford@linaro.org> | 2017-08-29 07:47:05 +0000 |
|---|---|---|
| committer | Richard Sandiford <rsandifo@gcc.gnu.org> | 2017-08-29 07:47:05 +0000 |
| commit | a844293de1d30da8ddba7384fc22ae59e857709f (patch) | |
| tree | 29ae014a56a196ff0764a9dd8c569efb193cb413 /gcc/tree-ssa-math-opts.c | |
| parent | 130fcab02f1fbb097fc52fc9a8892472e3fa0c6c (diff) | |
| download | gcc-a844293de1d30da8ddba7384fc22ae59e857709f.zip gcc-a844293de1d30da8ddba7384fc22ae59e857709f.tar.gz gcc-a844293de1d30da8ddba7384fc22ae59e857709f.tar.bz2 | |
Set the call nothrow flag more often
This patch sets the nothrow flag for various calls to internal functions
that are not inherently NOTHROW (and so can't be declared that way in
internal-fn.def) but that are used in contexts that can guarantee
NOTHROWness.
2017-08-29 Richard Sandiford <richard.sandiford@linaro.org>
gcc/
* gimplify.c (gimplify_call_expr): Copy the nothrow flag to
calls to internal functions.
(gimplify_modify_expr): Likewise.
* tree-call-cdce.c (use_internal_fn): Likewise.
* tree-ssa-math-opts.c (pass_cse_reciprocals::execute): Likewise.
(convert_to_divmod): Set the nothrow flag.
* tree-if-conv.c (predicate_mem_writes): Likewise.
* tree-vect-stmts.c (vectorizable_mask_load_store): Likewise.
(vectorizable_call): Likewise.
(vectorizable_store): Likewise.
(vectorizable_load): Likewise.
* tree-vect-patterns.c (vect_recog_pow_pattern): Likewise.
(vect_recog_mask_conversion_pattern): Likewise.
From-SVN: r251401
Diffstat (limited to 'gcc/tree-ssa-math-opts.c')
| -rw-r--r-- | gcc/tree-ssa-math-opts.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/gcc/tree-ssa-math-opts.c b/gcc/tree-ssa-math-opts.c index 073c9dc..df0bcd6 100644 --- a/gcc/tree-ssa-math-opts.c +++ b/gcc/tree-ssa-math-opts.c @@ -690,6 +690,8 @@ pass_cse_reciprocals::execute (function *fun) gimple_set_vdef (stmt2, gimple_vdef (call)); SSA_NAME_DEF_STMT (gimple_vdef (stmt2)) = stmt2; } + gimple_call_set_nothrow (stmt2, + gimple_call_nothrow_p (call)); gimple_set_vuse (stmt2, gimple_vuse (call)); gimple_stmt_iterator gsi2 = gsi_for_stmt (call); gsi_replace (&gsi2, stmt2, true); @@ -4100,6 +4102,8 @@ convert_to_divmod (gassign *stmt) tree res = make_temp_ssa_name (build_complex_type (TREE_TYPE (op1)), call_stmt, "divmod_tmp"); gimple_call_set_lhs (call_stmt, res); + /* We rejected throwing statements above. */ + gimple_call_set_nothrow (call_stmt, true); /* Insert the call before top_stmt. */ gimple_stmt_iterator top_stmt_gsi = gsi_for_stmt (top_stmt); |